British pop star Sophie Ellis-Bextor earned extra pocket money as a schoolgirl by selling her famous mother's autograph to classmates.

The Murder on the Dancefloor hitmaker's mum, Janet Ellis, was a household name in the U.K. in the 1980s as presenter of children's Tv show Blue Peter, and a young Ellis-Bextor took full advantage of her showbiz ties.

Guests on Blue Peter were famously given a special badge granting them free access to museums and other tourist attractions in the U.K., and Ellis-Bextor has now revealed she had boxes of the buttons which she would sell at school. She doubled the price if the buyer also wanted her mum's signature.

She tells U.K. talk show Loose Women, "I used to sell them in the playground. I regret that now. Fifty pence, or a pound with my mum's autograph. Isn't that terrible?"